JP5451850B2 - Elastic cylindrical member mounting device - Google Patents

Description

  The present invention relates to a mounting device for an elastic cylindrical member, and more particularly to a device for mounting an elastic cylindrical member such as a rubber balloon or a rubber band on a medical instrument such as an endoscope apparatus.

  In endoscope apparatuses, balloons that expand and contract are used for various purposes. For example, in an endoscopic device for observing the deep digestive tract such as the small intestine and the large intestine, an inflatable balloon is attached to the endoscope insertion part or endoscope insertion aid (sliding tube or overtube). By inflating the balloon, the endoscope insertion portion and the insertion aid are fixed in the body. In addition, in an ultrasonic inspection apparatus, an inflatable balloon is used to surround an ultrasonic scanning part at the tip of an ultrasonic probe and fill an ultrasonic transmission medium. In an ultrasonic endoscope, Inflatable balloons are used to surround the ultrasound transducer at the tip and fill the ultrasound transmission medium.

  Such a balloon is configured by an elastic body such as rubber, and its end portion is in a cylindrical shape having a smaller diameter than the outer diameter of an object to be attached (such as an endoscope insertion portion or an insertion aid) in a natural state. Yes. When mounting the balloon, the end of the balloon is covered with the attachment object while expanding the diameter. Next, the end of the balloon is fixed to the attachment object by expanding the diameter of the rubber band and fitting it to the end of the balloon.

  By the way, the rubber band is required to have a strong tightening force in order to ensure the airtightness of the balloon. On the other hand, the endoscope insertion part is a precision instrument and cannot be handled roughly. Therefore, a large force is required to expand the rubber band, but it must be carefully attached to handle precision equipment. Therefore, the work of covering the attachment object while expanding the end of the balloon or the rubber band is very troublesome, and there is a problem that the attachment work is troublesome.

  For this reason, conventionally, for example, a rubber band is attached to the endoscope insertion portion using a cylindrical guide jig having a tapered portion at one end. In this case, when the rubber band is inserted from the taper portion and slid on the taper portion to shift the rubber band to the cylindrical portion, the rubber band is expanded by the outer peripheral surface of the cylindrical portion. In this state, insert the tip of the insertion part to be installed into the guide jig, place the rubber band on the part to be attached, slide the rubber band from the cylindrical part, and drop the rubber band on the tip of the insertion part. Can be attached to the distal end of the insertion section. Although this guide jig has a simple structure, it has three steps, namely, expansion of the rubber band, movement to the cylindrical portion, and dropping of the rubber band onto the object to be mounted, and there is a problem that the work is troublesome.

  Therefore, in Patent Document 1, four rods that contact and expand the inner peripheral surface of an elastic cylindrical member such as a balloon or a rubber band are provided, and the diameter of the rod is expanded by a link mechanism. Inserted into the insertion part or insertion aid. According to this method, since a dedicated mounting jig is used, the diameter of the elastic cylindrical member can be easily increased, and the elastic cylindrical member can be easily attached to the endoscope apparatus or its accessory device. . Also in Patent Document 2, four pin members are expanded in diameter by using a link device, and a rubber band or a balloon is attached to the distal end of the endoscope insertion portion. Similarly, the elastic cylindrical member can be easily expanded in diameter. Yes.

  In Patent Document 3, instead of expanding each rod by a link mechanism, a dedicated mounting jig in which four arm elements are swingably mounted on a cylindrical member is used. The balloon is expanded in diameter and attached to the distal end of the endoscope insertion portion.

JP 2009-183603 A JP 2008-142324 A Special table 2011-517972

  However, the attachment jigs described in Patent Documents 1 and 2 require that the rubber band or balloon is attached by operating the opening / closing angle of the handle when the rubber band or balloon is attached to the distal end of the insertion portion, for example. There is a problem that separate operation is required. In Patent Document 3, an operation for feeding out the rubber band is required separately, and it is necessary to operate using both hands. As described above, all of the conventional devices require a delicate opening / closing operation of the handle, and additionally, an operation of feeding out the rubber band is also required. With one operation, the elastic cylindrical member such as the rubber band is inserted at the distal end of the insertion portion. There was a problem that it could not be attached to the camera, and there was a need to improve workability. In addition, these mounting jigs require a complicated link mechanism for moving the rod and a separate pushing member, resulting in a complicated apparatus configuration.

  The present invention has been made in view of such circumstances, and an elastic cylindrical member capable of easily and quickly mounting an elastic cylindrical member such as a balloon or a rubber band on a medical instrument such as an endoscope insertion portion. An object of the present invention is to provide a mounting device with a simple configuration.

  In order to achieve the above object, the elastic cylindrical member mounting apparatus of the present invention has an elastic cylindrical shape in which the elastic cylindrical member has a diameter larger than the outer diameter of the rod-shaped body to be attached and is mounted on the rod-shaped body from the outside. A member mounting apparatus, a movable cylinder into which a rod-shaped body can be inserted, a movable cylinder holding member that holds the movable cylinder in a movable manner in the cylinder center direction, and a cylinder core that is separated from the outer periphery of the movable cylinder in the circumferential direction. At least three arms that are arranged in parallel and swingable in the diameter direction of the movable cylinder, one end of which is attached to the movable cylinder holding member, and the inner peripheral surface of the elastic cylindrical member formed at the other end of the arm And a receiving portion in which the elastic cylindrical member can be set in a reduced diameter state and an elastic cylindrical member can be attached to the rod-like body by swinging the arm, and a movable cylinder with respect to the movable cylinder holding member Are moved relative to each other, and the arm is swung by the engagement between the movable cylinder and the arm, and the receiving portion Reduced diameter state, after the expanded state, and having a shift mechanism for pushing the resilient cylindrical member from the end face by the receiving portion of the movable cylinder, the.

  It is preferable that the arm has a parallel state engaging portion that is parallel to the movable cylinder when the receiving portion is in a diameter-expanded state. In this case, after the elastic cylindrical member is expanded larger than the outer diameter of the rod-shaped body, the movable cylinder does not act in the direction of opening the arm. Therefore, even if the arm is urged in the direction of diameter reduction, this urging force does not act in the movable direction of the movable cylinder. Further, in the state where the diameter of the elastic cylindrical member is expanded, an operating force for expanding the diameter of the arm becomes unnecessary.

  The shift mechanism moves the movable cylinder relative to the movable cylinder holding member between the first position and the second position, reduces the diameter of the receiving portion at the first position, and increases the diameter of the receiving portion at the second position. It is preferable to do.

  The arm has a swing restricting projection at one end that is in contact with the outer peripheral surface of the movable cylinder and is restricted from swinging, and the movable cylinder is in a reduced diameter state when the swing restricting protrusion rides on the first position. It is preferable to have a circumferential protrusion. In this case, the arm can be displaced only by engagement with the movable cylinder, and a biasing means for biasing the arm to be positioned at the first position or the second position can be omitted. Therefore, the number of parts can be reduced accordingly. In addition, unlike the case of using a rubber-like elastic body such as an O-ring, chemical resistance, heat resistance, deterioration, and the like can be suppressed.

  The shift mechanism includes a grip to which a movable cylinder holding member is attached. The grip is swingably attached to the grip body, and is engaged with the movable cylinder at one end and operated at the other end. It is preferable to have an operation lever having a portion. In this case, the movable cylinder can be slid by a gripping operation of the operation lever, and the elastic cylindrical member can be expanded and attached to the rod-like body only by operating the operation lever.

  By having the first urging member that urges the receiving portion in the direction of reducing the diameter, the arm can always be maintained in the direction of diameter reduction, and the arm does not swing freely, and is an elastic cylinder. Attachment to the receiving part of a member becomes easy. In addition, since the shift mechanism has the second urging member that urges the movable cylinder toward the first position, the receiving portion is in an accepting state of the elastic cylindrical body in the initial state. It is possible to easily set the shape body to the receiving portion.

  Of the plurality of arms, it is preferable that the tip of one arm is formed shorter than the tips of the other arms to provide an arm for positioning the attachment to the rod-shaped body. In this case, when the elastic cylindrical member is mounted on the rod-shaped body, first, the locking by one arm is released and a part of the elastic cylindrical member contacts the peripheral surface of the rod-shaped body. After confirming the attachment position in the axial direction from this contact position, the entire elastic cylindrical member can be dropped into the rod-like body, and the attachment position can be finely adjusted.

  Of the plurality of arms, it is preferable that the tip portion of one arm is formed longer than the tip portions of the other arms to be used as a locking arm when the elastic tubular member is detached. In this case, the elastic cylindrical member is engaged with the long arm even when the elastic cylindrical member is likely to be detached from the receiving portion at the time of expansion after the elastic cylindrical member is set in the receiving portion. Therefore, the elastic cylindrical member will not fly off. Further, it is preferable that the plurality of arms have a jump-out preventing piece that prevents the elastic cylindrical member set in the receiving part from jumping out at a position outside the receiving part. In this case, similarly, the elastic cylindrical member does not fly off from the receiving portion.

  The shift mechanism preferably includes a biasing member that biases the movable cylinder toward the second position. In this case, the arm is in an open state where it is located on the outer periphery of the movable cylinder. Therefore, since the arm is in the initial position in a state where it is stored along the outer periphery of the movable cylinder, even if an impact load is applied by accidental dropping or contact with another object, the tip of the arm is moved to the movable cylinder. Since it is not in a state of protruding from the arm, deformation and breakage of the arm can be suppressed. Moreover, it is preferable to have a motor for moving the movable cylinder. In this case, although the configuration is complicated, it is easy to automate the mounting.

  Preferably, the rod-shaped body is an endoscope insertion portion, and the elastic cylindrical member is a balloon or a balloon attachment rubber band attached to the endoscope insertion portion. In this case, it is possible to easily attach a balloon or a balloon attaching rubber band having a strong tightening force to an endoscope that is a precision machine.

  According to the present invention, the elastic cylindrical member is expanded from the insertion state of the elastic cylindrical member in which the receiving portion on the free end side of the arm is narrowed by the swing of the arm due to the movement of the movable cylinder, and the elastic cylindrical member is It is possible to shift to a state in which the rod-shaped body can be inserted by expanding the diameter larger than the outer diameter of the rod-shaped body. Thereafter, the elastic cylindrical member set in the receiving portion can be shifted to the extruded state by further movement of the movable cylinder. Therefore, by moving the movable cylinder, the diameter and dropping of the elastic cylindrical member can be continuously performed, and the elastic cylindrical member can be easily attached.

It is a perspective view which shows the mounting apparatus of the elastic cylindrical member of this invention. It is the longitudinal cross-sectional view. It is a perspective view which shows the state which attached the rubber band and the balloon to the endoscope insertion part. It is a front view of the arm periphery part which shows the state with which the rubber band was attached to the receiving part. It is sectional drawing of the VV line in FIG. It is a front view of the arm periphery part which shows the state which expanded the diameter of the rubber band. It is sectional drawing of the VII-VII line in FIG. It is a perspective view of the mounting apparatus which shows the state which expanded the diameter of the rubber band. It is sectional drawing equivalent to the VV line | wire of FIG. 4 which shows discharge | emission of a rubber band and a diameter reduction. It is a perspective view of the mounting apparatus which shows discharge | emission of a rubber band and a diameter reduction. It is a longitudinal cross-sectional view of the mounting apparatus which shows 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the arm of 3rd Embodiment. It is a whole schematic diagram showing a 4th embodiment of the present invention using a motor instead of an operation lever. It is a perspective view of the mounting apparatus of 5th Embodiment which makes a 2nd position an initial position. FIG. It is sectional drawing which shows the arm of a 2nd position. It is sectional drawing which shows the arm of a 1st position. It is a side view which shows the mounting apparatus of 6th Embodiment. It is a perspective view which shows the mounting apparatus of 7th Embodiment. It is sectional drawing which shows the arm of the 2nd position of the said 7th Embodiment. It is sectional drawing which shows the arm of the 1st position of the said 7th Embodiment. It is a perspective view which shows the mounting apparatus of 8th Embodiment.

  As shown in FIGS. 1 and 2, the mounting device (hereinafter simply referred to as a mounting device) 10 for an elastic cylindrical member according to the present invention includes an arm 12, an arm holding boss (movable tube holding member) 13, and a movable tube 14. And a grip 11, a control lever 15 and an arm closing ring 16 as a movable cylinder shift mechanism. The grip 11 is formed in a columnar shape and has an insertion hole 17 in the horizontal direction at the top. A lower portion of the grip 11 is a grip portion 11a that is gripped by a hand during operation. The movable cylinder 14 is movably accommodated in the insertion hole 17. The movable cylinder shift mechanism moves the movable cylinder 14 between the first position shown in FIGS. 1 and 2 and the second position shown in FIGS. 9 and 10 with respect to the arm holding boss 13. In the first position, the receiving portion 12c at the tip of the arm 12 is brought into a reduced diameter state. In the second position, the receiving portion 12c is in an expanded state.

  As shown in FIG. 3, the mounting apparatus 10 of the present invention is configured to mount a balloon 21 or a balloon mounting rubber band 22 as an elastic cylindrical member on a distal end 20 a of an endoscope insertion portion 20 as a rod-shaped body. Used. The balloon 21 is made of an elastic material such as silicon rubber, and is formed in a substantially cylindrical shape having both ends narrowed, that is, a cylindrical shape including small diameter end portions 21a and 21b and a bulged central portion 21c. The balloon 21 is disposed at a predetermined mounting position by inserting the insertion portion 20. The balloon 21 arranged at a predetermined mounting position is fixed to the insertion portion 20 by fixing its end portions 21 a and 21 b with a rubber band 22.

  The end portions 21a and 21b of the balloon 21 and the rubber band 22 have an inner diameter that is smaller than the outer diameter of the insertion portion 20 in a natural state where they are not expanded and contracted, and the insertion portion 20 cannot be inserted as it is. Therefore, using the mounting device 10 according to the present invention, the end portions 21a and 21b of the balloon 21 and the rubber band 22 are expanded in diameter so that the insertion portion 20 can be easily inserted. Thereby, the balloon end portions 21a and 21b and the rubber band 22 are attached to the loading position of the insertion portion 20 with high accuracy.

  As shown in FIG. 2, an arm holding boss 13 as a movable cylinder holding member is attached to the grip 11 in which the movable cylinder 14 is movably accommodated so as to be externally fitted to the movable cylinder 14. The arm holding boss 13 is composed of a stepped cylindrical body having a small diameter portion 13a. Then, in a state where the small diameter portion 13 a is inserted in the insertion hole 17 of the grip 11, the small diameter portion 13 a is fixed to the grip 11 so as not to be removed by the fixing screw 25.

  As shown in FIG. 4, the arm holding boss 13 is formed with four arm holding grooves 30 in the diameter direction. The arm holding grooves 30 are arranged at intervals of 90 degrees in the circumferential direction. The arm 12 is placed in the arm holding groove 30. The arm 12 is swingably attached to the arm holding boss 13 via an attachment shaft 26.

  An arm holding groove 32 is also formed in the movable cylinder 14 at a position corresponding to the arm holding groove 30 of the arm holding boss 13. When the arm 12 is inserted into the arm holding groove 32, the end of the arm is narrowed. As shown in FIG. 2, the movable cylinder 14 has an engagement hole 33 that penetrates the movable cylinder 14 at an intermediate position in the circumferential direction of the two arm holding grooves 32.

  As shown in FIG. 5, the arm 12 is an elongated belt-like metal plate, and has a crank shape that is loosely bent by the arm main body portion 12 a, the diameter expanding action portion 12 b, and the receiving portion 12 c. An attachment hole 31 is formed at one end of the arm main body 12 a, and the attachment shaft 26 is inserted into the attachment hole 31. At the other end (free end) of the arm 12, a receiving portion 12c on which the rubber band 22 is set is formed. The inner side surface 12d of the diameter expanding action portion 12b is an engaging portion with the movable cylinder 14, and the movable cylinder 14 comes into contact with the inner side surface 12d, and the arm 12 is indicated by an arrow A1 by the right movement of the movable cylinder 14. Rotates in the spreading direction.

  Each arm 12 is formed with an arc-shaped notch 35 on the outer edge near the attachment hole 31. An arm closing ring 16 made of an O-ring is fitted on the notch 35. Further, a circumferential groove 13c (see FIG. 2) for accommodating the arm closing ring 16 is formed on the outer peripheral surface of the arm holding boss 13. The arm closing ring 16 biases each arm 12 inward. By this urging, the arm 12 is locked to the distal end surface 14a of the movable cylinder 14, and no further is rotated inward. In this state, the four receiving portions 12c are close to each other, and the narrowed receiving portion 12c allows the rubber band 22 to be set in a natural state without being expanded in diameter. Since each arm 12 is always closed by the arm closing ring 16, the arm 12 is accommodated in the arm holding boss 13 and the grooves 30 and 32 of the movable cylinder 14 in a compact manner.

  As shown in FIG. 2, a lever support shaft 40 is attached to the center portion of the grip 11. An operation lever 15 is swingably attached to the lever support shaft 40 via an attachment shaft 41. The operation lever 15 has an action portion 15a on the upper side of the mounting shaft 41 and an operation portion 15b on the lower side. The action portion 15 a is inserted into the engagement hole 33 of the movable cylinder 14 through the notch 13 b of the arm holding boss 13. In order to prevent the arm closing ring 16 and the operating lever 15 from interfering with each other, the operating lever 15 is provided with an interference avoiding recess 15c in order to avoid interference with the arm closing ring 16.

  A coil spring 43 is provided between the operation unit 15 b and the grip 11. One end of the coil spring 43 is inserted into the spring housing hole 44 of the grip 11, and the other end is locked to the spring locking protrusion 45 of the operating portion 15b, thereby urging the operating lever 15 in the direction of arrow A2. Yes. Thereby, the operation part 15b is always open with respect to the grip 11. Further, since the action portion 15a is inserted into the engagement hole 33 and engaged with the engagement hole 33, the movable cylinder 14 is moved to the arrow opposite to the pushing direction A4 indicated by the arrow A4 by the bias of the coil spring 43. It is urged in the storage direction indicated by A3. Thereby, the movable cylinder 14 is in the first position. In the first position, the receiving portion 12c of the arm 12 is in a squeezed state, and the rubber band 22 can be easily set on the receiving portion 12c.

  Next, the case where the mounting apparatus 10 is used for mounting the rubber band 22 for fixing the balloon 21 to the endoscope insertion portion 20 will be described. First, as shown in FIG. 1, the rubber band 22 is set on the receiving portion 12 c of the arm 12.

  Next, by holding the grip 11 a of the grip 11 and gripping the operation lever 15, the rotational displacement of the operation lever 15 is transmitted to the movable cylinder 14 through the engagement hole 33 as shown in FIG. 2. As shown in FIG. 5, the movable cylinder 14 moves in the insertion direction 17 of the grip 11 in the pushing direction of the arrow A <b> 4. By the movement of the movable cylinder 14, the tip of the movable cylinder 14 pushes the inner side surface 12d of the diameter expanding action portion 12b of each arm 12, and the arm 12 is displaced so as to open as indicated by an arrow A1. Due to the displacement of the arm 12, the rubber band 22 set on the receiving portion 12c is gradually expanded.

  Eventually, as shown in FIG. 7, when the tip of the movable cylinder 14 gets over the inner side surface 12d of the diameter expanding action part 12b and the contact between the movable cylinder 14 and the diameter expanding action part 12b is completed, the rubber band 22 is maximum. The diameter is expanded. As shown in FIGS. 6 and 8, in this maximum diameter expanded state, the rubber band 22 is expanded to a size exceeding the outer diameter of the endoscope insertion portion 20, so that the endoscope insertion portion is inserted into the movable cylinder 14. 20 can be entered. When the distal end of the movable cylinder 14 passes through the diameter expansion action portion 12b by pushing out the movable cylinder 14 with the operation lever 15, the movable cylinder 14 thereafter contacts the parallel state engaging portion 12f which is the inner surface of the receiving portion 12c. To do.

  In this state, the endoscope insertion portion 20 is put in and out of the movable cylinder 14, and the rubber band 22 is positioned at the rubber band mounting position. The parallel state engaging portion 12f of the receiving portion 12c is formed to be parallel to the movable cylinder 14 in the maximum diameter expanded state. Therefore, when the movable cylinder 14 and the parallel state engaging portion 12f are engaged, even if the repulsive force in the diameter reducing direction of the rubber band 22 acts on the arm 12, the repulsive force is in a parallel state. The operating lever 15 can maintain equilibrium in this state without acting in the storage direction of the movable cylinder 14 (direction in which the operating lever 15 returns) via the arm 12.

  Thereafter, by further pulling the operation portion 15b of the operation lever 15, the movable cylinder 14 moves to the right side indicated by the arrow A4. However, the arm 12 does not expand further, and the rubber band 22 slides on the receiving portion 12c by the distal end surface 14a of the movable cylinder 14. At this time, since the arm 12 and the movable cylinder 14 are in a parallel state by the parallel state engaging portion 12f, the movable cylinder 14 can be pushed out without requiring a large force. As shown in FIGS. 9 and 10, when the distal end surface 14a of the movable cylinder 14 passes through the distal end of the receiving portion 12c of the arm 12, the rubber band 22 is not supported by the receiving portion 12c by this passage, and the endoscope The diameter is reduced at the set position of the insertion portion 20, and the rubber band 22 is reliably attached to the set position.

  As described above, the diameter expansion of the rubber band 22 and the dropping into the endoscope insertion portion 20 can be reliably performed only by operating the lever of the operation lever 15, and the rubber band 22 is inserted into the endoscope insertion portion 20. Installation can be performed easily and reliably. Moreover, unlike Patent Documents 1 to 3, the rubber band 22 can be easily attached without separately performing the diameter expansion process and the slide process.

  The four arms 12 are attached to the arm holding boss 13 at intervals of 90 degrees in the circumferential direction. However, the number of the arms 12 may be three or more. The inner peripheral surface of the rubber band 22 can be expanded more than the outer diameter.

  Next, a second embodiment of the present invention will be described. In the second embodiment, as shown in FIG. 11, the length of the receiving portion 12c in the first embodiment is the same as that of the first embodiment for one arm 12, and the other three arms 46 are The length of the arm 12 of the first embodiment is approximately twice as long as the receiving portion 12c, and the movable range of the movable cylinder 14 is longer than the amount of movement of the first embodiment by the extension of the other three arms 46. It is just that big. In the following embodiments, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. In the second embodiment, when the movable cylinder 14 is moved, the rubber band 22 is first removed from the short receiving portion 12c and comes into contact with the attachment position of the endoscope insertion portion 20. At this time, the set position can be accurately grasped from the position of the rubber band 22 in contact with the endoscope insertion portion 20, and further fine adjustment of the set position becomes possible. Accordingly, the set positioning of the rubber band 22 can be reliably performed with high accuracy. Thereafter, when the movable cylinder 14 is further moved, the rubber band 22 is detached from the receiving portions 46c of the other three arms 46, and the rubber band 22 is attached to the endoscope insertion portion 20 at an accurate set position. .

  In addition, since the other three arms 46 are formed longer than the other arms 12 in this way, the probability that the rubber band 22 is detached from the receiving portion 46c is reduced, and the rubber band 22 is expanded during diameter expansion. 22 is prevented from flying off the receiving portion 46c. It should be noted that one or more arms 46 for preventing popping out may be made longer. In this case, the movable cylinder 14 is moved until the rubber band 22 slides from the long arm 46 and is reduced in diameter to the endoscope insertion portion 20.

  As shown in FIG. 12, the third embodiment uses an arm 47 arranged so as to cover the pop-out preventing piece 12 e on the receiving portion 12 c in order to prevent the rubber band 22 from popping out. In this case, even when the rubber band 22 is detached from the receiving portion 12c, the rubber band 22 is pressed by the pop-out preventing piece 12e, so that the rubber band 22 can be fastened to the receiving portion 12c, and the rubber band 22 is popped out. Can be prevented. The pop-out preventing piece 12e may be attached to one or more arms 47, but is preferably attached to all the arms 47 in order to have certainty.

  In the first embodiment, the shift mechanism of the movable cylinder 14 is configured by the grip 11, the operation lever 15, and the arm closing ring 16, but any mechanism that can move the movable cylinder 14 in the cylinder center direction may be used. The shift mechanism 50 of the fourth embodiment shown in FIG. The shift mechanism 50 according to the fourth embodiment includes a motor 51, a cam 52, a link bar 53, a connection ring 54, a motor controller 55, and a shift button 56 instead of the operation lever 15. The motor controller 55 rotates the motor 51 by a predetermined amount by pressing the shift button 56 after inserting the rubber band 22 into the receiving portion 12c. By the rotation of the motor 51, the movable cylinder 14 is moved to the right, the arm 12 is expanded, and the rubber band 22 is stopped at the maximum diameter expanded state. In this stopped state, the endoscope insertion part 20 is inserted into the movable cylinder 14 from the distal end of the movable cylinder 14, and the rubber band 22 is positioned so as to be the attachment site of the endoscope insertion part 20. Thereafter, by pressing the shift button 56, the motor 51 is rotated by a certain amount to move the movable cylinder 14 further, and the rubber band 22 is pushed out from the receiving portion 12c by the distal end surface 14a of the movable cylinder 14. As a result, the rubber band 22 is semi-automatically attached to a predetermined position of the endoscope insertion portion 20.

  In place of the operation of the shift button 56, the sensor 58 for detecting the completion of the setting of the rubber band 22 to the receiving portion 12c and the detection that the endoscope insertion portion 20 has been inserted into the movable cylinder 14 for a certain length. An insertion portion set completion sensor 59 is provided, and the rubber band 22 is automatically mounted at a predetermined position of the endoscope insertion portion 20 by inputting the signals of these sensors 58 and 59 instead of the operation signal of the shift button 56. be able to.

  Next, a fifth embodiment of the present invention will be described. In the first embodiment, the operating lever 15 is urged by the coil spring 43 so that the receiving portion 12c of the arm 12 is in the first position where the diameter is reduced. For this reason, the tapered receiving portion 12 c always protrudes from the end of the movable cylinder 14. On the other hand, since the mounting device 10 is used by an operator, the mounting device 10 may be dropped or contacted with other objects, and may be subjected to an impact. On the other hand, the arm 12 having the receiving portion 12c has an elongated shape. Therefore, when it receives an impact due to dropping or contact, it is likely to be deformed or damaged, and there is a problem in durability. For this reason, in the fifth embodiment, as shown in FIG. 14, the second position where the receiving portion 63c of the arm 63 is expanded is set to the normal state, and the tapered receiving portion 63c is set to the movable cylinder 61. The receiving part 63c is structured so as not to receive an impact directly.

  In the first embodiment, the grip 11, the operating lever 15, and the arm closing ring 16 constitute a shift mechanism. The arm closing ring 16 is an O-ring made of rubber or elastomer, and the portion in contact with the outer periphery of the arm 12 is repeatedly slid and stretched. Therefore, it is difficult to ensure durability due to wear. In particular, when the rubber ring 16 is used, it is difficult to ensure heat resistance and durability against the heat load of autoclave sterilization assumed in medical equipment. In the fifth embodiment, in order to improve heat resistance and durability, the arm 63 is opened and closed so that the receiving portion 63c is in a reduced diameter state and an enlarged diameter state without using an urging member such as an O-ring. .

  As shown in FIG. 14, the mounting device 60 of the fifth embodiment includes a movable cylinder 61, an arm holding boss 62 as a movable cylinder holding member, an arm 63, a receiving portion 63 c, and a shift mechanism 65. The movable cylinder 61, the arm holding boss 62, the arm 63, and the receiving portion 63c have basically the same configuration as in the first embodiment.

  The shift mechanism 65 has a grip 66. The grip 66 is attached to the arm holding boss 62. The grip 66 has two support bars 67, a horizontal bar 68, a vertical bar 69, and an operation lever 70.

  As shown in FIG. 15, the two support rods 67 are, for example, screwed to the lower part of the arm holding boss 62. The horizontal bar 68 is fixed to the lower ends of the two support bars 67 by means of mounting screws 71. The upper end of the vertical bar 69 is screwed to one end side to which the support bar 67 is fixed. A bifurcated mounting portion 72 is formed on the other end side of the horizontal bar 68. An operation lever 70 is rotatably held on the attachment portion 72 by an attachment shaft 73. The support body 67, the horizontal bar 68, and the vertical bar 69 constitute a grip body.

  As shown in FIG. 16, the movable cylinder 61 has a locking flange 61a at one end. The locking flange 61 a abuts on the end surface 62 a of the arm holding boss 62 and restricts further movement of the movable cylinder 61 in the arm holding boss 62. The position where the locking flange 61a stops when it hits the end face 62a is the second position. In this second position, the arm 63 is in a state along the outer peripheral surface of the movable cylinder 61, and the receiving portion 63 c is also positioned on the outer peripheral surface of the distal end portion of the movable cylinder 61.

  As shown in FIG. 15, the engagement hole 33 passes through the other end portion (tip portion) of the movable cylinder 61. The distal end portion 70 a of the operation lever 70 is inserted into the engagement hole 33. The tip 70a is formed in a tapered stepped cylinder.

  The shift mechanism 65 has a torsion spring 75. The torsion spring 75 is attached to the attachment portion 72 of the operation lever 70. One end portion 75 a of the torsion spring 75 is locked in the spring locking hole 72 a of the mounting portion 72, and the other end portion 75 b is locked in the spring locking hole 70 b of the distal end portion 70 a of the operation lever 70. The torsion spring 75 is torsionally biased in a direction in which both end portions 75a and 75b are separated. As a result, the movable cylinder 61 moves to the right with respect to the arm holding boss 62 to the second position shown in FIGS. 15 and 16. In this second position, the arm 63 is positioned on the outer peripheral surface of the movable cylinder 61, and the receiving portion 63c is in an expanded state.

  As shown in FIG. 16, the arm 63 of this embodiment has a swing restricting protrusion 63a. The movable cylinder 61 has a slide groove 61b, a circumferential protrusion 61c, and a receiving groove 61d. The swing restricting protrusion 63 a is provided near the attachment end of the arm 63. The swing restricting protrusion 63 a contacts the bottom surface of the slide groove 61 b of the movable cylinder 61 so that the receiving portion 63 c does not leave the outer peripheral surface of the movable cylinder 61.

  The slide groove 61 b is formed on the outer peripheral surface of the movable cylinder 61 in the cylinder core direction. Therefore, when the movable cylinder 61 moves in the arm holding boss 62, the swing restricting projection 63a is in sliding contact with the slide groove 61b, so that the arm 63 does not swing and is in an expanded state parallel to the cylinder core. Is retained.

  A circumferential protrusion 61c is formed on the distal end side of the slide groove 61b. When the movable cylinder 61 moves to the first position shown in FIG. 17, the peripheral protrusion 61 c rotates the arm 63 in a direction in which the swing restricting protrusion 63 a climbs and the receiving portion 63 c decreases in diameter.

  Therefore, unlike the first embodiment, it is not necessary to provide the arm closing ring 16 that prevents the arm 63 from spreading and biases the arm 63 inwardly on the outside of the arm 63. Therefore, the number of parts can be reduced by this amount. Further, since the arm closing ring 16 is not used, the durability is not deteriorated due to wear or rubbing. Furthermore, heat resistance and durability can be secured against the heat load of autoclave sterilization.

  In the present embodiment, the initial position due to the spring bias is reversed compared to that of the first embodiment, and in the initial state where the operation lever 70 is not operated, the movable cylinder 61 is moved to the second position by the torsion spring 75. Set. For this reason, the arm 63 and the receiving portion 63c are housed in a state along the outer peripheral surface of the movable cylinder 61 by the locking of the swing restricting projection 63a and the slide groove 61b. Even if it receives an impact due to contact or contact, it is not deformed or damaged, and has excellent durability.

  When the rubber band 22 is loaded into the receiving portion 63c, the operation lever 70 is pushed, and the movable cylinder 61 is stored in the arm holding boss 62 and set in the first position. As a result, the arm 63 protrudes from the tip of the movable cylinder 61, and the receiving portion 63c is reduced in diameter due to the engagement between the swing restricting projection 63a and the circumferential projection 61c. After the rubber band 22 is loaded in the receiving portion 63 c, the movable cylinder 61 is accommodated in the arm holding boss 62 by returning the operation lever 70. As the movable cylinder 61 is stored, the engagement between the arm 63 and the movable cylinder 61 causes the arm 63 to rotate in the opening direction, so that the receiving portion 63c becomes the diameter-expanded position. At the enlarged diameter position, the distal end 20a of the endoscope insertion portion 20 is inserted, the rubber band 22 is moved to the band fastening position of the insertion portion 20, and then the operation lever 70 is further returned to thereby move the distal end of the movable cylinder 61. The rubber band 22 can be fastened to the insertion portion 20 by pushing out the rubber band 22 from the receiving portion 63c using the end surface 61e.

  In the fifth embodiment, as shown in FIG. 15, the movable cylinder 61 is biased to the second position in the arm holding boss 62 by a torsion spring 75 provided on the mounting shaft 73 of the operation lever 70. However, other spring members can be used as the biasing member. For example, like the mounting device 79 of the sixth embodiment shown in FIG. 18, the movable cylinder 61 is biased to the second position by using a tension coil spring 81 between the support rod 80 and the rear end of the movable cylinder 61. . In this case, it is not necessary to use the torsion spring 75 for the operation lever 82, and the configuration on the operation lever 82 side can be simplified. Further, by using the grip body 83 in which the horizontal bar 83a and the vertical bar 83b are integrated into an L shape, the configuration of the grip body 83 can be simplified. On the outer peripheral surface of the arm holding boss 62, a spring insertion groove 62b is formed in the circumferential direction. A metal C-shaped ring spring 64 is inserted into the spring insertion groove 62b. The ring spring 64 is attached through the attachment hole 63 d of the arm 63. The ring spring 64 urges the arm 63 in a direction to reduce the diameter of the receiving portion 63c.

  As shown in FIGS. 19 to 21, in the mounting device 88 of the seventh embodiment, the relationship between the swing restricting protrusion 63 a of the arm 63, the slide groove 61 b of the movable cylinder 61, and the peripheral surface protruding portion 61 c of the fifth embodiment. In place of the swinging arm 63, the arm engagement plate 85 is fixed to the tip of the movable cylinder 84, and the inner projection 85a between the outer surface of the arm 86 and the arm engagement plate 85 is used to change the shape shown in FIG. As shown, the receiving portion 86c is reduced in diameter. In the present embodiment, at the second position (see FIGS. 19 and 20) in which the arm 86 is housed on the outer peripheral surface of the movable cylinder 84, the arm 86 and the receiving portion 86c are covered and protected from the outside by the arm engagement board 85. Therefore, bending resistance due to impact caused by dropping or contact is improved. In the seventh embodiment as well, it is preferable to bias the movable cylinder 87 to the second position using a biasing member such as a spring.

  As shown in FIG. 22, in the mounting device 89 of the eighth embodiment, a coil spring 90 is compacted between the end surface 62a of the arm holding boss 62 of the fifth embodiment and the locking flange 61a of the movable cylinder 61. The movable cylinder 61 is urged to the first position by using the coil spring 90. In this embodiment, as in the first embodiment, when the diameter of the receiving portion 63 c in the first position is the initial position, the receiving portion 63 c and the arm 63 are exposed from the tip of the movable cylinder 61. In this respect, although the impact resistance is lower than that in the fifth embodiment, the rubber band 22 can be loaded into the insertion portion 20 (see FIG. 3) with the same operational feeling as in the first embodiment. The shift mechanism 91 includes a support bar 92, a lever mounting bar 93, and an operation lever 94.

  Although illustration is omitted, the arm 12 and the movable cylinder 14 of the first embodiment are provided with the swing restricting projection 63a, the slide groove 61b, the peripheral surface projection 61c as in the fifth embodiment, By providing the arm engagement board 85 as in the embodiment so that the ring 16 is not used, it is possible to ensure heat resistance and durability against the heat load of autoclave sterilization. Although not shown in the figure, heat resistance and durability can be similarly secured by using a metal C-shaped ring spring 64 shown in FIG. 18 instead of the ring 16. When the ring spring 64 is used, an attachment hole 63d is formed in the arm 12, the ring spring 64 is inserted into the attachment hole 63d, and the arm 12 is biased inward. Although not shown, a torsion spring may be individually attached to each arm, and each arm may be urged in the reduced diameter direction.

  In each of the above embodiments, the slide groove 61b is formed to guide the swing restriction projection 63a. However, instead of the slide groove 61b, the swing restriction projection 63a is directly slid onto the outer peripheral surface of the movable cylinder 61. You may contact. In the fifth to eighth embodiments, the motor 51 may be used to drive the shift mechanism 50 according to the fourth embodiment shown in FIG.

  In the above embodiment, the rubber band 22 has been described as an example of the elastic cylindrical member. However, the mounting device 10 of the present invention can be used to attach the balloon 21 in addition to the rubber band 22. Further, the medical instrument on the side to be attached is not limited to the endoscope insertion portion 20, and may be, for example, an insertion aid such as an overtube or a sliding tube, or a treatment instrument such as an ultrasonic probe. . Moreover, although the said embodiment demonstrated in the example which mounts the substantially cylindrical balloon 21 and the rubber band 22, the cylindrical member with which it mounts is not limited to this, The cylindrical part which can be elastically deformed is used. What is necessary is just to have, for example, a bag-like balloon may be sufficient.

  In the above-described embodiment, the present invention has been described with an example in which the rubber band 22 is attached to the endoscope insertion portion 20, but for example, when an O-ring or other elastic ring is attached to the outer peripheral groove of the shaft, The mounting device 10 can be used.

10, 60, 79, 88, 89 Mounting device 11 Grip 12, 46, 47, 63, 86 Arm 12c, 63c, 86c Receiving part 13, 62 Arm holding boss 14, 61, 84 Movable cylinder 15, 70, 82, 94 Operation lever 16 Arm closing ring 20 Endoscope insertion part 21 Balloon 22 Rubber band 50, 65 Shift mechanism 61a Locking flange 61b Slide groove 61c Peripheral protrusion 63a Swing restricting protrusion 85 Arm engagement board

Claims (12)

In the mounting device for the elastic cylindrical member, the elastic cylindrical member is expanded from the outer diameter of the rod-shaped body to be attached, and mounted on the rod-shaped body from the outside.
A movable cylinder into which the rod-like body can be inserted;
A movable cylinder holding member that holds the movable cylinder movably in the cylinder center direction;
At least three arms that are arranged on the outer periphery of the movable cylinder in the circumferential direction and are substantially parallel to the cylinder core, and that are swingable in the diameter direction of the movable cylinder, with one end attached to the movable cylinder holding member;
A diameter-reduced state that is formed at the other end of the arm, receives an inner peripheral surface of the elastic cylindrical member, and can be set by the swing of the arm, and the elastic cylindrical member is A receiving portion that becomes a diameter-expandable state that can be attached to the rod-shaped body;
After the movable cylinder is moved relative to the movable cylinder holding member, the arm is rocked by the engagement of the movable cylinder and the arm, and the receiving portion is in the reduced diameter state or the enlarged diameter state. A shift mechanism for extruding the elastic cylindrical member from the receiving portion by an end surface of the movable cylinder;
A mounting device for an elastic cylindrical member, comprising:   2. The elastic tubular member mounting device according to claim 1, wherein the arm has a parallel state engaging portion in which the receiving portion is parallel to the movable tube in the expanded state.   The shift mechanism relatively moves the movable cylinder between the first position and the second position with respect to the movable cylinder holding member, sets the receiving portion to the reduced diameter state at the first position, and at the second position. 3. The elastic tubular member mounting device according to claim 2, wherein the receiving portion is in the expanded state. The arm has a swing restricting projection at the one end that is in contact with the outer peripheral surface of the movable cylinder and is controlled to swing.
4. The elastic cylindrical member mounting device according to claim 3, wherein the movable cylinder has a peripheral surface protrusion that causes the swing restricting protrusion to ride on the first position to reduce the diameter of the receiving portion. . The shift mechanism is
A grip to which the movable cylinder holding member is attached;
The grip is
The grip body,
5. An operation lever which is swingably attached to the grip body and has an engagement end portion engaged with the movable cylinder at one end and an operation portion at the other end. The mounting apparatus of the elastic cylindrical member of description. A first urging member that urges the receiving portion in a direction to reduce the diameter;
4. The elastic cylindrical member mounting device according to claim 3, wherein the shift mechanism includes a second urging member that urges the movable cylinder toward the first position.   The tip of one arm of the arms is formed shorter than the tip of the other arm, and is used for positioning the mounting position on the rod-shaped body. The mounting apparatus of the elastic cylindrical member of Claim 1.   The tip of one arm of the arms is longer than the tip of another arm, and is used for locking when the elastic cylindrical member is detached. The mounting apparatus of the elastic cylindrical member of any one of Claims.   9. The elasticity according to claim 1, wherein the arm has a jump-out preventing piece that prevents the elastic cylindrical member set in the receiving part from popping out outside the receiving part. Cylindrical member mounting device.   6. The elastic cylindrical member mounting device according to claim 4, wherein the shift mechanism includes a biasing member that biases the movable cylinder toward the second position.   The elastic cylindrical member mounting device according to claim 4, wherein the shift mechanism includes a motor that moves the movable cylinder.   12. The rod-shaped body is an endoscope insertion portion, and the elastic cylindrical member is a balloon or a balloon attachment rubber band attached to the endoscope insertion portion. The mounting apparatus of the elastic cylindrical member of description.

Images